Reading off gravitational radiation waveforms in numerical relativity calculations: Matching to linearized gravity

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

29

Relativity And Gravitation, Late Stages Of Stellar Evolution

Scientific paper

Two methods are described, both based on the use of multipole moments in linearized gravity, to read off gravitational radiation waveforms during numerical relativity simulations. In the first, matching is made at a finite radius in the weak-field exterior of a strong-field source to an analytic template developed via an infinitesimal gauge transformation from a general solution to the vacuum weak-field equations. The matching procedure allows the asymptotic waveforms to be separated from the confusing influences of the source's (e.g., black hole, neutron star, collapsing stellar core) stationary moments, the wave's near-zone field, and gauge dependencies in the metric. This is achieved by computing the multipole-moment amplitudes of the gravitational field with a set of surface integrals of the metric over one (or more) coordinate two-sphere(s). The two-surface(s) need not be placed far out in the local wave zone, nor does the method require the existence of a deep near zone (i.e., the source need not be slow motion). The procedure is demonstrated through its application to two standard axisymmetric numerical relativity gauges (quasi-isotropic and radial). The second matching approach uses a surface integral over components of the Riemann tensor to eliminate gauge effects. The near-zone field is separated off as in the previous method. This latter technique may be applicable to problems in any gauge.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Reading off gravitational radiation waveforms in numerical relativity calculations: Matching to linearized gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reading off gravitational radiation waveforms in numerical relativity calculations: Matching to linearized gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reading off gravitational radiation waveforms in numerical relativity calculations: Matching to linearized gravity will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1049629

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.